Adjust cancelabilty of touchmoves that are queued when scroll start occurs

content/renderer/input/main_thread_event_queue_task_list.cc

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/input/main_thread_event_queue_task_list.h"
 
 namespace content {
 
 MainThreadEventQueueTaskList::MainThreadEventQueueTaskList() {}
 
 MainThreadEventQueueTaskList::~MainThreadEventQueueTaskList() {}
 
 void MainThreadEventQueueTaskList::Queue(
     std::unique_ptr<MainThreadEventQueueTask> event) {
   for (auto last_event_iter = queue_.rbegin(); last_event_iter != queue_.rend();
        ++last_event_iter) {
-    switch ((*last_event_iter)->CoalesceWith(*event.get())) {
-      case MainThreadEventQueueTask::CoalesceResult::Coalesced:
+    switch ((*last_event_iter)->FilterNewEvent(*event.get())) {
+      case MainThreadEventQueueTask::FilterResult::CoalescedEvent:
         return;
-      case MainThreadEventQueueTask::CoalesceResult::CannotCoalesce:
+      case MainThreadEventQueueTask::FilterResult::StopIterating:
         break;
-      case MainThreadEventQueueTask::CoalesceResult::KeepSearching:
+      case MainThreadEventQueueTask::FilterResult::KeepIterating:
         continue;
     }
     break;
   }
   queue_.emplace_back(std::move(event));
 }
 
 std::unique_ptr<MainThreadEventQueueTask> MainThreadEventQueueTaskList::Pop() {
   std::unique_ptr<MainThreadEventQueueTask> result;
   if (!queue_.empty()) {
     result.reset(queue_.front().release());
     queue_.pop_front();
   }
   return result;
 }
 
 }  // namespace